NO. 5 CAMBRIAN TRILOBITES RESSER 37 



Careful separation of the specimens identified as this and other 

 species according to locaHty necessitates a reahgnment. 



Lower Cambrian, Pioche ; (loc. 31a) Panaca Road, southeast of 

 Pioche, Nevada. 



Cotypes.—U.S.'NM. no. 15428. 



Kochaspis augusta (Walcott) 



Crepiccphalus augusta Walcott (part), U. S. Geol. Surv. Bull. 30, p. 208, pi. 28, 

 fig. 2a, 1886. (Not 2 = K. nez>adcusis ; 2^ ^another genus.) 



Locality same as preceding. 

 Holotype. — U.S.N.M. no. 15430. 



Kochaspis nevadensis, n. sp. 



Crepiccphalus augusta Walcott (part), U. S. Geol. Surv. Bull. 30, p. 207, 

 pi. 28, fig. 2, 1886. (See preceding.) 



Published figures exaggerate the narrowness which characterizes 

 this species. 



Lower Cambrian, Pioche formation; (loc. 30) 8 miles north of 

 Bennetts Spring, Highland Range, Nevada. 



Holotype.— U.S. 'NM. no. 61643. 



Kochaspis highlandensis, n. sp. 



Crepiccphalus liliana Walcott (part), U. S. Geol. Surv. Bull. 30, p. 208, pi. 28, 

 figs. 3^, 2)C, 1886. (See preceding.) 



Rim on published figure drawn too concave. Pygidium like K. 

 augusta but with narrower axis. 

 . Occurrence same as preceding. 

 Cotypes. — U.S.N.M. nos. 61640-1. 



Kochaspis cecinna (Walcott) 



Crepiccphalus cecinna Walcott, Smithsonian Misc. Coll., vol. 67, no. 3, p. 99, 

 pi. II, figs. I, la, 1917. 



Lower Cambrian, Mount Whyte ; (loc. 63a) Ptarmigan Peak, 

 5^ miles northeast of Lake Louise, Alberta. 

 Cotypes.— U.S.'N.M. nos. 64365-6. 



Kochaspis celer (Walcott) 



Crepiccphalus cclcr Walcott, Smithsonian Misc. Coll., vol. 67, no. 3, p. loi, 

 pi. II, fig. 2, 1917. 



Ptychoparia chisia Walcott, idem, pi. 11, fig. 3. 

 Middle Cambrian, Ptarmigan ; (loc. 58k) Mount Stephen, 3 miles 

 east of Field, British Columbia. 



Holotype. — U.S.N.M. no. 64367 ; paratype, no. 64368. 



Kochaspis chares (Walcott) 



Crepiccphalus chares Walcott, Smithsonian Misc. Coll., vol. 6y, no. 2, p. 35, 

 pi. 6, figs. 5-5C, 1917. 



